Good for you! You've already got a life! Kendo sounds cool. I tried karate once back when I was a few years younger and not nearly in as good a shape as I am now. Hurt my neck doing backrolls so bad I never went back.
Any exercise is good for purging out negativity. 40 IS just a number. If you keep it up you'll feel better and be in better health than you were at a younger age and really know it!
"The answers are within you" (can't remember who). Unfortunately, so is the bullshit.
